ENTRY AND START SYSTEM(for Entry Function) Room Oscillator does not Recognize Key

DTC Code DTC Name
Room Oscillator does not Recognize Key

DESCRIPTION

If code verification cannot be performed in the vehicle interior, there may be problems with the communication between the vehicle (indoor electrical key antenna assembly [front floor], [rear floor] or [inside luggage]) and electrical key transmitter sub-assembly, or the certification ECU (smart key ECU assembly) may be malfunctioning. When the electrical key transmitter sub-assembly is brought into the vehicle, verification of the key ID code transmitted from the electrical key transmitter sub-assembly and the key ID code stored in the certification ECU (smart key ECU assembly) is performed. If verification cannot be performed or the codes do not match, the engine switch cannot be turned on (IG) and the engine cannot be started.

When a door is unlocked and the electrical key transmitter sub-assembly is brought into the vehicle, the certification ECU (smart key ECU assembly) activates the indoor electrical key antenna assembly which transmits radio waves to detect the electrical key transmitter sub-assembly. If the electrical key transmitter sub-assembly recognizes that it is in the detection area, it responds with the key ID code. This information is received by the indoor electrical key antenna and then sent to the certification ECU (smart key ECU assembly).

WIRING DIAGRAM

B300397E10

CAUTION / NOTICE / HINT

Note:

  • The entry and start system (for Entry Function) uses a multiplex communication system (LIN communication system) and the CAN communication system. Inspect the communication function by following How to Proceed with Troubleshooting (Click here). Troubleshoot the entry and start system (for Entry Function) after confirming that the communication systems are functioning properly.

  • When using the GTS with the vehicle engine switch off, connect the GTS to the vehicle and turn a courtesy light switch on and off at intervals of 1.5 seconds or less until communication between the GTS and the vehicle begins. Then select the Model Code "KEY REGIST" under manual mode and enter the following menus: Body Electrical / Entry&Start. While using the GTS, periodically turn a courtesy light switch on and off at intervals of 1.5 seconds or less to maintain communication between the GTS and the vehicle.

  • Before replacing the certification ECU (smart key ECU assembly), refer to the entry and start system (for Entry Function) precaution.

    Click hereClick here

  • After repair, confirm that no DTCs are output by performing the "DTC Output Confirmation Operation".

  • The indoor electrical key antenna assemblies have an antenna coil between each two CLG terminals.

  • The door control receiver is also related to interior verification.

PROCEDURE

  1. CHECK ENTRY DOOR LOCK OPERATION

    1. Check that the entry lock and unlock functions operate for each door.

      Click here

      Tip:

      If the door control receiver is defective, code verification does not begin in the cabin and the entry functions do not operate.

      OK

      All door entry lock and unlock functions operate normally.

    Result

    Proceed to

    OK

    NG
    NG

    GO TO OTHER PROBLEM (Proceed to Problem Symptoms Table)

    Click here

    OK

  2. CHECK PUSH START FUNCTION

    1. B323969C01

      *1

      Engine Switch

      *2

      Electrical Key Transmitter Sub-assembly

      Remove the transmitter battery of the electrical key transmitter sub-assembly.

      Click here

    2. With the brake pedal*1 or clutch pedal*2 depressed, face the logo side of the electrical key transmitter sub-assembly towards the engine switch, hold the transmitter near the engine switch and then press the engine switch.

      • *1: except Manual Transaxle

      • *2: for Manual Transaxle

    3. When operating the engine switch, check whether the engine starts.

      Tip:

      • When the electrical key transmitter sub-assembly cannot be verified even though it is inside the detection area, the engine start check can be performed by removing the transmitter battery from the electrical key transmitter sub-assembly and holding the electrical key transmitter sub-assembly near the engine switch.

      • If the engine cannot be started when performing this inspection, the certification ECU (smart key ECU assembly), steering lock ECU (steering lock actuator assembly) or ID code box (immobiliser code ECU)* may be malfunctioning.

        *: w/ Multi-information Display (Dot Display Type)

      OK

      Engine starts.

    Result

    Proceed to

    OK

    NG
    NG

    GO TO ENTRY AND START SYSTEM (FOR START FUNCTION)

    Click here

    OK

  3. CHECK WAVE ENVIRONMENT

    1. Install the transmitter battery to the electrical key transmitter sub-assembly.

      Click here

    2. Bring the electrical key transmitter sub-assembly near the No. 1 indoor electrical key antenna assembly (front floor) and perform a entry and start system check.

      Click here

      Note:

      Communication may not be possible if the electrical key transmitter sub-assembly is within 0.2 m (0.656 ft.) of the No. 1 indoor electrical key antenna assembly (front floor).

    3. Bring the electrical key transmitter sub-assembly near the No. 2 indoor electrical key antenna assembly (rear floor) and perform a entry and start system check.

      Click here

      Tip:

      Check that the customize status of the "Ignition Available Area" has been "All".

      Note:

      Communication may not be possible if the electrical key transmitter sub-assembly is within 0.2 m (0.656 ft.) of the No. 2 indoor electrical key antenna assembly (rear floor).

    4. Bring the electrical key transmitter sub-assembly near the No. 3 indoor electrical key antenna assembly (inside luggage) and perform a entry and start system check.

      Click here

      Tip:

      Check that the customize status of the "Ignition Available Area" has been "All".

      Note:

      Communication may not be possible if the electrical key transmitter sub-assembly is within 0.2 m (0.656 ft.) of the No. 3 indoor electrical key antenna assembly (inside luggage).

    Tip:

    • As the effect of wave interference decreases by moving the electrical key transmitter sub-assembly close to each indoor electrical key antenna assembly, it may be possible to check whether wave interference is the cause of the problem.

    • If the problem only occurs in specific places or at specific times, wave interference may be the cause of the problem. Also, the vehicle may be have the effects of wave interference with the parts installed by the dealer. As a result, when parts have been installed by the dealer, it may be necessary to remove those parts before inspecting the vehicle.

    • There may be wave interference if the vehicle is near broadcasting antennas, large video displays, wireless garage door opener systems, wireless security cameras, home security systems, etc. In this case, move the vehicle to a different location and check if there is any improvement.

    • If a tool for checking electric waves, such as a signal strength meter, is available, move around the area while observing both the LF band (used by the vehicle antenna to form the detection area) and RF band (used by the electrical key transmitter sub-assembly for transmission) to check for locations where there is wave interference.

    Result

    Proceed to

    Entry and start system cannot be operated

    Entry and start system can be operated
    Entry and start system can be operated

    AFFECTED BY WAVE INTERFERENCE

    Entry and start system cannot be operated

  4. CHECK KEY DIAGNOSTIC MODE

    1. Check the following antennas in key diagnostic mode.

    2. Select either channel 1 or channel 2 and perform the key diagnostic mode inspection for each channel.

      Tip:

      If the buzzer sounds with [CH1] displayed but not with [CH2], the electrical key transmitter sub-assembly cannot be detected by channel 2 due to a malfunction, such as wave interference.

      1. B340886C01

        *a

        Inspection Point

        Check the No. 1 indoor electrical key antenna assembly (front floor).

        When the electrical key transmitter sub-assembly is at either inspection point, check that the wireless door lock buzzer sounds.

        Body Electrical > Entry&Start > Utility

        Tester Display

        Communication Check(Key Diag Mode)
      2. B340887C01

        *a

        Inspection Point

        Check the No. 2 indoor electrical key antenna assembly (rear floor).

        When the electrical key transmitter sub-assembly is at either inspection point, check that the wireless door lock buzzer sounds.

        Body Electrical > Entry&Start > Utility

        Tester Display

        Communication Check(Key Diag Mode)
      3. B340884C01

        *a

        Inspection Point

        Check the No. 3 indoor electrical key antenna (inside luggage):

        When the electrical key transmitter sub-assembly is at either inspection point, check that the wireless door lock buzzer sounds.

        Body Electrical > Entry&Start > Utility

        Tester Display

        Communication Check(Key Diag Mode)
        Tip:

        • If the buzzer sounds, it can be determined that the vehicle interior transmitters are operating normally.

        • It is possible to check which indoor electrical key antenna assembly (front floor, rear floor or inside luggage) is operating by the sounding of the buzzer.

        • If the buzzer does not sound for any indoor electrical key antenna assemblies, the certification ECU (smart key ECU assembly) circuit may be malfunctioning.

        OK

        Wireless door lock buzzer sounds.

    Result

    Proceed to

    Front floor operation check fails

    Rear floor operation check fails

    Inside luggage operation check fails

    All operation checks are normal
    Rear floor operation check fails

    CHECK HARNESS AND CONNECTOR (NO. 2 INDOOR ELECTRICAL KEY ANTENNA ASSEMBLY - CERTIFICATION ECU)Click here

    Inside luggage operation check fails

    CHECK HARNESS AND CONNECTOR (NO. 3 INDOOR ELECTRICAL KEY ANTENNA ASSEMBLY - CERTIFICATION ECU)Click here

    All operation checks are normal

    REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

    Front floor operation check fails

  5. CHECK HARNESS AND CONNECTOR (NO. 1 INDOOR ELECTRICAL KEY ANTENNA ASSEMBLY - CERTIFICATION ECU)

    1. Disconnect the G45 No. 1 indoor electrical key antenna assembly (front floor) connector.

    2. Disconnect the G84 certification ECU (smart key ECU assembly) connector.

    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection

      Condition

      Specified Condition

      G45-1 (ANTE5) - G84-3 (CLG5)

      Always

      Below 1 Ω

      G45-3 (CLGB) - G84-2 (CG5B)

      Always

      Below 1 Ω

      G45-1 (ANTE5) or G84-3 (CLG5) - Body ground

      Always

      10 kΩ or higher

      G45-3 (CLGB) or G84-2 (CG5B) - Body ground

      Always

      10 kΩ or higher

    Result

    Proceed to

    OK

    NG
    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  6. CHECK CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) (OUTPUT TO NO. 1 INDOOR ELECTRICAL KEY ANTENNA)

    1. B250988C16

      *a

      Front view of wire harness connector

      (to No. 1 Indoor Electrical Key Antenna [Front Floor])

      *b

      Waveform

      *c

      Within approximately 30 seconds from when the door is closed

      *d

      After approximately 30 seconds from when the door is closed

      Disconnect the G45 No. 1 indoor electrical key antenna assembly (front floor) connector.

    2. Connect the G84 certification ECU (smart key ECU assembly) connector.

    3. Using an oscilloscope, check the waveform.

      OK

      Tester Connection

      Condition

      Tool Setting

      Specified Condition

      G45-1 (ANTE5) - G45-3 (CLGB)

      Procedure:

      1. Engine switch off

      2. Electrical key transmitter sub-assembly not inside vehicle

      3. Door is open

      4. Door is closed

      5. Within 30 seconds

      2 V/DIV., 500 ms/DIV.

      Pulse generation

      (See waveform)

    Result

    Proceed to

    OK

    NG
    NG

    REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

    OK

  7. REPLACE NO. 1 INDOOR ELECTRICAL KEY ANTENNA ASSEMBLY (FRONT FLOOR)

    1. Temporarily replace the No. 1 indoor electrical key antenna assembly (front floor) with a new or known good one.

      Click here

    Result

    Proceed to

    NEXT
    NEXT

  8. CHECK KEY DIAGNOSTIC MODE

    1. Check the following antenna in key diagnostic mode.

    2. B340886C01

      *a

      Inspection Point

      Select either channel 1 or channel 2 and perform the key diagnostic mode inspection for each channel.

      Body Electrical > Entry&Start > Utility

      Tester Display

      Communication Check(Key Diag Mode)
      Tip:

      If the buzzer sounds with [CH1] displayed but not with [CH2], the electrical key transmitter sub-assembly cannot be detected by channel 2 due to a malfunction, such as wave interference.

      1. Check the No. 1 indoor electrical key antenna assembly (front floor). When the electrical key transmitter sub-assembly is at either inspection point, check that the wireless door lock buzzer sounds.

        OK

        Wireless door lock buzzer sounds.

    Result

    Proceed to

    OK

    NG
    OK

    END (NO. 1 INDOOR ELECTRICAL KEY ANTENNA ASSEMBLY [FRONT FLOOR] WAS DEFECTIVE)

    NG

    REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

  9. CHECK HARNESS AND CONNECTOR (NO. 2 INDOOR ELECTRICAL KEY ANTENNA ASSEMBLY - CERTIFICATION ECU)

    1. Disconnect the M18 No. 2 indoor electrical key antenna assembly (rear floor) connector.

    2. Disconnect the G83 certification ECU (smart key ECU assembly) connector.

    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection

      Condition

      Specified Condition

      M18-1 (ANTE6) - G83-11 (CLG6)

      Always

      Below 1 Ω

      M18-3 (CLGB) - G83-10 (CG6B)

      Always

      Below 1 Ω

      M18-1 (ANTE6) or G83-11 (CLG6) - Body ground

      Always

      10 kΩ or higher

      M18-3 (CLGB) or G83-10 (CG6B) - Body ground

      Always

      10 kΩ or higher

    Result

    Proceed to

    OK

    NG
    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  10. CHECK CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) (OUTPUT TO NO. 2 INDOOR ELECTRICAL KEY ANTENNA)

    1. B250988C17

      *a

      Front view of wire harness connector

      (to No. 2 Indoor Electrical Key Antenna [Rear Floor])

      *b

      Waveform

      *c

      Within approximately 30 seconds from when the door is closed

      *d

      After approximately 30 seconds from when the door is closed

      Disconnect the M18 No. 2 indoor electrical key antenna assembly (rear floor) connector.

    2. Connect the G83 certification ECU (smart key ECU assembly) connector.

    3. Using an oscilloscope, check the waveform.

      OK

      Tester Connection

      Condition

      Tool Setting

      Specified Condition

      M18-1 (ANTE6) - M18-3 (CLGB)

      Procedure:

      1. Engine switch off

      2. Electrical key transmitter sub-assembly not inside vehicle

      3. Door is open

      4. Door is closed

      5. Within 30 seconds

      2 V/DIV., 500 ms/DIV.

      Pulse generation

      (See waveform)

    Result

    Proceed to

    OK

    NG
    NG

    REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

    OK

  11. REPLACE NO. 2 INDOOR ELECTRICAL KEY ANTENNA ASSEMBLY (REAR FLOOR)

    1. Temporarily replace the No. 2 indoor electrical key antenna assembly (rear floor) with a new or known good one.

      Click here

    Result

    Proceed to

    NEXT
    NEXT

  12. CHECK KEY DIAGNOSTIC MODE

    1. Check the following antenna in key diagnostic mode.

    2. B340887C01

      *a

      Inspection Point

      Select either channel 1 or channel 2 and perform the key diagnostic mode inspection for each channel.

      Body Electrical > Entry&Start > Utility

      Tester Display

      Communication Check(Key Diag Mode)
      Tip:

      If the buzzer sounds with [CH1] displayed but not with [CH2], the electrical key transmitter sub-assembly cannot be detected by channel 2 due to a malfunction, such as wave interference.

      1. Check the No. 2 indoor electrical key antenna assembly (rear floor). When the electrical key transmitter sub-assembly is at either inspection point, check that the wireless door lock buzzer sounds.

        OK

        Wireless door lock buzzer sounds.

    Result

    Proceed to

    OK

    NG
    OK

    END (NO. 2 INDOOR ELECTRICAL KEY ANTENNA ASSEMBLY [REAR FLOOR] WAS DEFECTIVE)

    NG

    REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

  13. CHECK HARNESS AND CONNECTOR (NO. 3 INDOOR ELECTRICAL KEY ANTENNA ASSEMBLY - CERTIFICATION ECU)

    1. Disconnect the M21 No. 3 indoor electrical key antenna assembly (inside luggage) connector.

    2. Disconnect the G83 certification ECU (smart key ECU assembly) connector.

    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection

      Condition

      Specified Condition

      M21-1 (ANTE7) - G83-9 (CLG7)

      Always

      Below 1 Ω

      M21-3 (CLGB) - G83-8 (CG7B)

      Always

      Below 1 Ω

      M21-1 (ANTE7) or G83-9 (CLG7) - Body ground

      Always

      10 kΩ or higher

      M21-3 (CLGB) or G83-8 (CG7B) - Body ground

      Always

      10 kΩ or higher

    Result

    Proceed to

    OK

    NG
    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  14. CHECK CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) (OUTPUT TO NO. 3 INDOOR ELECTRICAL KEY ANTENNA)

    1. B250988C18

      *a

      Front view of wire harness connector

      (to No. 3 Indoor Electrical Key Antenna [Inside Luggage])

      *b

      Waveform

      *c

      Within approximately 30 seconds from when the door is closed

      *d

      After approximately 30 seconds from when the door is closed

      Disconnect the M21 No. 3 indoor electrical key antenna assembly (inside luggage) connector.

    2. Connect the G83 certification ECU (smart key ECU assembly) connector.

    3. Using an oscilloscope, check the waveform.

      OK

      Tester Connection

      Condition

      Tool Setting

      Specified Condition

      M21-1 (ANTE7) - M21-3 (CLGB)

      Procedure:

      1. Engine switch off

      2. Electrical key transmitter sub-assembly not inside vehicle

      3. Door is open

      4. Door is closed

      5. Within 30 seconds

      2 V/DIV., 500 ms/DIV.

      Pulse generation

      (See waveform)

    Result

    Proceed to

    OK

    NG
    NG

    REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

    OK

  15. REPLACE NO. 3 INDOOR ELECTRICAL KEY ANTENNA ASSEMBLY (INSIDE LUGGAGE)

    1. Temporarily replace the No. 3 indoor electrical key antenna assembly (inside luggage) with a new or known good one.

      Click here

    Result

    Proceed to

    NEXT
    NEXT

  16. CHECK KEY DIAGNOSTIC MODE

    1. Check the following antenna in key diagnostic mode.

    2. B340884C01

      *a

      Inspection Point

      Select either channel 1 or channel 2 and perform the key diagnostic mode inspection for each channel.

      Body Electrical > Entry&Start > Utility

      Tester Display

      Communication Check(Key Diag Mode)
      Tip:

      If the buzzer sounds with [CH1] displayed but not with [CH2], the electrical key transmitter sub-assembly cannot be detected by channel 2 due to a malfunction, such as wave interference.

      1. Check the No. 3 indoor electrical key antenna assembly (inside luggage). When the electrical key transmitter sub-assembly is at either inspection point, check that the wireless door lock buzzer sounds.

        OK

        Wireless door lock buzzer sounds.

    Result

    Proceed to

    OK

    NG
    OK

    END (NO. 3 INDOOR ELECTRICAL KEY ANTENNA ASSEMBLY [INSIDE LUGGAGE])

    NG

    REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)